συνάπτειν
From LSJ
τὸ τερπνὸν παρεμπορεύομαι → yield delight besides instruction, mix business with pleasure
Greek > English (Woodhouse Verbs Reversed)
(see also συνάπτω): attach, bind, construct, contract, devise, engage, fasten, join, match, unite, bring into conflict, close of another, fasten together, make fast, shut the eyes